The latest patents: Canon 35mm f/1.4, Sigma 200mm f/2 and more

Canon 35mm f/1.4 lens:

Canon 35mm f:1.4 lens patent
Canon's patent for improved image stabilization (IS):

Canon's patent for improved image stabilization
Sigma 200mm f/2 DG OS HSM Sports lens:

Sigma 200mm f:2 DG OS HSM Sports lens patent
Sigma 70-300mm f/4-5.6 DG OS HSM lens:

Sigma 70-300mm f:4-5.6 DG OS HSM lens patent

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